What are four things that cause weathering

Well four things are frost weathering, thermal stress, salt wedging, and Biological Weathering.

Explanation: There are a few more, but you only needed four.

ans.

gregor john mendel is known for study of inheritance in pea plants. he used garden pea plant for his study, having alternative traits for various characters. he performed cross-breeding in pea plants to check how characters are transmitted between parents to offspring, such as cross between pure tall and pure dwarf plant. mendel studied the inheritance patterns in pea plants for various generations.

thus, the correct answer includes options and f).